COMM 300: Chi-squared tests

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[edit] When to run crosstabs

• If you read the word "ASSOCIATION" in the question, use crosstabs. Among other things, crosstabs can compare two nominal level variables
• The null hypothesis is that there is no association
• The alternative hypothesis is that there is an association

[edit] How to answer a crosstabs question

• You will get a Chi-squared statistic. The correct answer (using crosstabs) will report the cross tabs chi square and p value
  • Use this p value to accept or reject the null
  • Go into detail about how the expected value compares with the actual value.